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@article{DAN_1981_256_5_a0, author = {S. V. Buyalo}, title = {Stability of the topology of hyperbolic space forms under variation of the curvature}, journal = {Doklady Akademii Nauk}, pages = {1033--1036}, publisher = {mathdoc}, volume = {256}, number = {5}, year = {1981}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1981_256_5_a0/} }
S. V. Buyalo. Stability of the topology of hyperbolic space forms under variation of the curvature. Doklady Akademii Nauk, Tome 256 (1981) no. 5, pp. 1033-1036. http://geodesic.mathdoc.fr/item/DAN_1981_256_5_a0/